离子交换反应富集——XRF测定地质样中痕量砷

CONCENTRTION OF TRACE ARSENIC BY ION EXCHANGE—REACTION AND ITS DETERMINATION WITH XRF

在0,5mol/L HCl介质中,利用As(Ⅲ)与巯基纸上的Sb(Ⅲ)交换反应富集痕量砷,通过测定AsKα和SbKα线强度变化总量,X射线荧光光谱法测定砷,方法的检出限为0.10μg/g,经地质标样考证,结果与推荐值吻合。

In a medium of 0. 5 mol/L HC1 ,As( Ⅲ) can be concentrated by special susfhydryl paper adsorbed Sb( Ⅲ) with ion exchange-reaction. The As may be determinated by XRF as ainount of variance of strength of SbKa and AsKa have been determined. The detection limit is 0. 10 μg/g for the sample. Data obtained on the basis of analysis of GSD-l,GSD-2,GSD-3,GSD-4 and GSD-6 by this method is in good accordance with certified values.